N,M=map(int,input().split())

x=[set([1,2,3]) for _ in range(N)]
for _ in range(M):
	p,q,a,b=map(int,input().split())
	p-=1
	q-=1
	if a in x[p]:
		x[p].remove(a)
		if len(x[p])==0:
			print(-1)
			exit()
	if b in x[q]:
		x[q].remove(b)
		if len(x[q])==0:
			print(-1)
			exit()
	
y=[]
for i in range(N):
	y.append(x[i].pop())
print(*y)